﻿#include "vdata_modbus_master.h"

uint8_t modbus_master_addr = 1;
vdata_modbus_master_t vdata_modbus_master_data;

/* CRC 高位字节值表 */
const uint8_t master_crc_hi[] = {
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
    0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
    0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
    0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
    0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
    0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
    0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
    0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
    0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
    0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40
} ;

/* CRC低位字节值表*/
const uint8_t master_crc_lo[] = {
    0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06,
    0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD,
    0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,
    0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A,
    0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4,
    0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
    0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3,
    0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4,
    0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,
    0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29,
    0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED,
    0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
    0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60,
    0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67,
    0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,
    0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68,
    0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E,
    0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
    0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71,
    0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92,
    0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,
    0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B,
    0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B,
    0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
    0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42,
    0x43, 0x83, 0x41, 0x81, 0x80, 0x40
} ;

uint16_t modbus_master_crc16(uint8_t *puchMsg, uint16_t usDataLen)
{
    uint8_t uchCRCHi = 0xFF ; /* 高CRC字节初始化 */
    uint8_t uchCRCLo = 0xFF ; /* 低CRC字节初始化 */
    uint32_t uIndex ;         /* CRC循环中的索引 */
    while (usDataLen--)       /* 传输消息缓冲区  */
    {
        uIndex = uchCRCHi ^ *puchMsg++ ; /* 计算CRC */
        uchCRCHi = uchCRCLo ^ master_crc_hi[uIndex] ;
        uchCRCLo = master_crc_lo[uIndex] ;
    }
    return (uchCRCHi << 8 | uchCRCLo) ;
}

uint16_t vdata_modbus_master_parse(vdata_modbus_master_t *pdata, uint8_t *raw_data, uint16_t length)
{
    uint8_t *p = NULL;
    uint16_t i = 0;
    if(pdata && raw_data && (length > 4)){
        p = &raw_data[0];
        switch(raw_data[1]){
            case 1:
                /*地址(1Byte) 功能码(1Byte)	字节数(1Byte)	 线圈状态(N/8 + 1 Bytes) CRC(2Bytes)*/
                pdata->func_01_recv.dev_addr  = *p++;
                pdata->func_01_recv.func_code = *p++;
                pdata->func_01_recv.bytes     = *p++;
                if((pdata->func_01_recv.bytes + 3) > length){
                    pdata->err_code = 1;
                    return 0;
                }
                if((pdata->func_01_recv.dev_addr == pdata->func_01_send.dev_addr)&&(pdata->func_01_recv.func_code == pdata->func_01_send.func_code)){
                    pdata->func_01_recv.crc16 = modbus_master_crc16(raw_data, 3 + pdata->func_01_recv.bytes);
                    if(pdata->func_01_recv.crc16 == ((raw_data[3 + pdata->func_01_recv.bytes] << 8) + raw_data[4 + pdata->func_01_recv.bytes])){
                        if(pdata->func_01_recv.coil_data){
                            memcpy(pdata->func_01_recv.coil_data, p, pdata->func_01_recv.bytes);
                        }
                        pdata->err_code = 0;
                        vdata_modbus_master_sem_post((void *)0x01);
                        return length;
                    }
                }
                return 0;

            case 2:
                /*地址(1Byte) 功能码(1Byte)	字节数(1Byte)	 线圈状态(N/8 + 1 Bytes) CRC(2Bytes)*/
                pdata->func_02_recv.dev_addr  = *p++;
                pdata->func_02_recv.func_code = *p++;
                pdata->func_02_recv.bytes     = *p++;
                if((pdata->func_02_recv.bytes + 3) > length){
                    pdata->err_code = 1;
                    return 0;
                }
                if((pdata->func_02_recv.dev_addr == pdata->func_02_send.dev_addr)&&(pdata->func_02_recv.func_code == pdata->func_02_send.func_code)){
                    pdata->func_02_recv.crc16 = modbus_master_crc16(raw_data, 3 + pdata->func_02_recv.bytes);
                    if(pdata->func_02_recv.crc16 == ((raw_data[3 + pdata->func_02_recv.bytes] << 8) + raw_data[4 + pdata->func_02_recv.bytes])){
                        if(pdata->func_02_recv.input_status_data){
                            memcpy(pdata->func_02_recv.input_status_data, p, pdata->func_02_recv.bytes);
                        }
                        pdata->err_code = 0;
                        vdata_modbus_master_sem_post((void *)0x02);
                        return length;
                    }
                }
                return 0;

            case 3:
                /*地址(1Byte) 功能码(1Byte)	字节数(1Byte)	 保持寄存器状态(N Bytes) CRC(2Bytes)*/
                pdata->func_03_recv.dev_addr  = *p++;
                pdata->func_03_recv.func_code = *p++;
                pdata->func_03_recv.bytes     = *p++;
                if((pdata->func_03_recv.bytes + 3) > length){
                    pdata->err_code = 1;
                    return 0;
                }
                if((pdata->func_03_recv.dev_addr == pdata->func_03_send.dev_addr)&&(pdata->func_03_recv.func_code == pdata->func_03_send.func_code)){
                    pdata->func_03_recv.crc16 = modbus_master_crc16(raw_data, 3 + pdata->func_03_recv.bytes);
                    if(pdata->func_03_recv.crc16 == ((raw_data[3 + pdata->func_03_recv.bytes] << 8) + raw_data[4 + pdata->func_03_recv.bytes])){
                        if(pdata->func_03_recv.hold_reg_data){
                            for(i = 0; i < pdata->func_03_recv.bytes; i += 2){
                                pdata->func_03_recv.hold_reg_data[i / 2] = (p[i] << 8) + p[i + 1];
                            }
                            //memcpy(pdata->func_03_recv.hold_reg_data, p, pdata->func_03_recv.bytes);
                        }
                        pdata->err_code = 0;
                        vdata_modbus_master_sem_post((void *)0x03);
                        return length;
                    }
                }
                return 0;

            case 4:
                /*地址(1Byte) 功能码(1Byte)	输入字节数(1Byte)	 输入寄存器状态(N Bytes) CRC(2Bytes)*/
                pdata->func_04_recv.dev_addr  = *p++;
                pdata->func_04_recv.func_code = *p++;
                pdata->func_04_recv.bytes     = *p++;
                if((pdata->func_04_recv.bytes + 3) > length){
                    pdata->err_code = 1;
                    return 0;
                }
                if((pdata->func_04_recv.dev_addr == pdata->func_04_send.dev_addr)&&(pdata->func_04_recv.func_code == pdata->func_04_send.func_code)){
                    pdata->func_04_recv.crc16 = modbus_master_crc16(raw_data, 3 + pdata->func_04_recv.bytes);
                    if(pdata->func_04_recv.crc16 == ((raw_data[3 + pdata->func_04_recv.bytes] << 8) + raw_data[4 + pdata->func_04_recv.bytes])){
                        if(pdata->func_04_recv.input_reg_data){
                            for(i = 0; i < pdata->func_04_recv.bytes; i += 2){
                                pdata->func_04_recv.input_reg_data[i / 2] = (p[i] << 8) + p[i + 1];
                            }
                            //memcpy(pdata->func_04_recv.input_reg_data, p, pdata->func_04_recv.bytes);
                        }
                        pdata->err_code = 0;
                        vdata_modbus_master_sem_post((void *)0x04);
                        return length;
                    }
                }
                return 0;
                break;

            case 5:
                /*地址(1Byte) 功能码(1Byte)	线圈地址(2Bytes) 写入值(2Bytes) CRC(2Bytes)*/
                pdata->func_05_recv.dev_addr  = *p++;
                pdata->func_05_recv.func_code = *p++;
                pdata->func_05_recv.coil_addr = (p[0] << 8) + p[1];
                p += 2;
                pdata->func_05_recv.coil_data = (p[0] << 8) + p[1];
                p += 2;
                if((pdata->func_05_recv.dev_addr == pdata->func_05_send.dev_addr)&&(pdata->func_05_recv.func_code == pdata->func_05_send.func_code)){
                    pdata->func_05_recv.crc16 = modbus_master_crc16(raw_data, 6);
                    if(pdata->func_05_recv.crc16 == ((raw_data[6] << 8) + raw_data[7])){
                        if(pdata->func_05_recv.coil_data == pdata->func_05_send.coil_value){
                            pdata->err_code = 0;
                            vdata_modbus_master_sem_post((void *)0x05);
                            return length;
                        }else{
                            pdata->err_code = 1;
                        }
                    }
                }
                return 0;

            case 6:
                /*地址(1Byte) 功能码(1Byte)	保持寄存器地址(2Bytes) 保持寄存器值(2Bytes) CRC(2Bytes)*/
                pdata->func_06_recv.dev_addr  = *p++;
                pdata->func_06_recv.func_code = *p++;
                pdata->func_06_recv.hold_reg_addr = (p[0] << 8) + p[1];
                p += 2;
                pdata->func_06_recv.hold_reg_data = (p[0] << 8) + p[1];
                p += 2;
                if((pdata->func_06_recv.dev_addr == pdata->func_06_send.dev_addr)&&(pdata->func_06_recv.func_code == pdata->func_06_send.func_code)){
                    pdata->func_06_recv.crc16 = modbus_master_crc16(raw_data, 6);
                    if(pdata->func_06_recv.crc16 == ((raw_data[6] << 8) + raw_data[7])){
                        if(pdata->func_06_recv.hold_reg_data == pdata->func_06_send.hold_reg_value){
                            pdata->err_code = 0;
                            vdata_modbus_master_sem_post((void *)0x06);
                            return length;
                        }else{
                            pdata->err_code = 1;
                        }
                    }
                }
                return 0;

            case 15:
                /*地址(1Byte) 功能码(1Byte)	起始地址(2Bytes) 写入线圈个数(2Bytes) CRC(2Bytes)*/
                pdata->func_15_recv.dev_addr  = *p++;
                pdata->func_15_recv.func_code = *p++;
                pdata->func_15_recv.start_addr = (p[0] << 8) + p[1];
                p += 2;
                pdata->func_15_recv.coil_num = (p[0] << 8) + p[1];
                p += 2;
                if((pdata->func_15_recv.dev_addr == pdata->func_15_send.dev_addr)&&(pdata->func_15_recv.func_code == pdata->func_15_send.func_code)){
                    pdata->func_15_recv.crc16 = modbus_master_crc16(raw_data, 6);
                    if(pdata->func_15_recv.crc16 == ((raw_data[6] << 8) + raw_data[7])){
                        if(pdata->func_15_recv.coil_num == pdata->func_15_send.coil_num){
                            pdata->err_code = 0;
                            vdata_modbus_master_sem_post((void *)0x0F);
                            return length;
                        }else{
                            pdata->err_code = 1;
                        }
                    }
                }
                return 0;

            case 0xFF:
                /*地址(1Byte) 功能码(1Byte)	起始地址(2Bytes) 写入寄存器个数(2Bytes) CRC(2Bytes)*/
                pdata->func_16_recv.dev_addr  = *p++;
                pdata->func_16_recv.func_code = *p++;
                pdata->func_16_recv.start_addr = (p[0] << 8) + p[1];
                p += 2;
                pdata->func_16_recv.reg_num = (p[0] << 8) + p[1];
                p += 2;
                if((pdata->func_16_recv.dev_addr == pdata->func_16_send.dev_addr)&&(pdata->func_16_recv.func_code == pdata->func_16_send.func_code)){
                    pdata->func_16_recv.crc16 = modbus_master_crc16(raw_data, 6);
                    if(pdata->func_16_recv.crc16 == ((raw_data[6] << 8) + raw_data[7])){
                        if(pdata->func_16_recv.reg_num == pdata->func_16_send.hold_reg_num){
                            pdata->err_code = 0;
                            vdata_modbus_master_sem_post((void *)0x10);
                            return length;
                        }else{
                            pdata->err_code = 1;
                        }
                    }
                }
                return 0;

            default:
                if(raw_data[1] & 0x80){
                    pdata->err_code = raw_data[2];
                }
                return 0;
        }
    }else {
        return 0;
    }
}

uint16_t vdata_modbus_master_packet(vdata_modbus_master_t *pdata)
{
    uint8_t *p = NULL;
    uint16_t i = 0;
    if(pdata){
        p = pdata->send_buff;
        switch(pdata->func_code){
            case 1:
                /*地址(1Byte) 功能码(1Byte) 起始地址(2Bytes) 线圈数量(2 Bytes) CRC(2Bytes)*/
                *p++ = pdata->func_01_send.dev_addr;
                *p++ = pdata->func_01_send.func_code;
                *p++ = (pdata->func_01_send.start_addr >> 8) & 0xFF;
                *p++ = pdata->func_01_send.start_addr & 0xFF;
                *p++ = (pdata->func_01_send.coil_num >> 8) & 0xFF;
                *p++ = pdata->func_01_send.coil_num & 0xFF;
                pdata->func_01_send.crc16 = modbus_master_crc16(pdata->send_buff, (p - pdata->send_buff));
                *p++ = (pdata->func_01_send.crc16 >> 8) & 0xFF;
                *p++ = pdata->func_01_send.crc16 & 0xFF;
                break;

            case 2:
                /*地址(1Byte) 功能码(1Byte) 起始地址(2Bytes) 输入数量(2 Bytes) CRC(2Bytes)*/

                *p++ = pdata->func_02_send.dev_addr;
                *p++ = pdata->func_02_send.func_code;
                *p++ = (pdata->func_02_send.start_addr >> 8) & 0xFF;
                *p++ = pdata->func_02_send.start_addr & 0xFF;
                *p++ = (pdata->func_02_send.input_status_num >> 8) & 0xFF;
                *p++ = pdata->func_02_send.input_status_num & 0xFF;
                pdata->func_02_send.crc16 = modbus_master_crc16(pdata->send_buff, (p - pdata->send_buff));
                *p++ = (pdata->func_02_send.crc16 >> 8) & 0xFF;
                *p++ = pdata->func_02_send.crc16 & 0xFF;
                break;

            case 3:
                /*地址(1Byte) 功能码(1Byte) 起始地址(2Bytes) 保持寄存器数量(2 Bytes) CRC(2Bytes)*/
                *p++ = pdata->func_03_send.dev_addr;
                *p++ = pdata->func_03_send.func_code;
                *p++ = (pdata->func_03_send.start_addr >> 8) & 0xFF;
                *p++ = pdata->func_03_send.start_addr & 0xFF;
                *p++ = (pdata->func_03_send.hold_reg_num >> 8) & 0xFF;
                *p++ = pdata->func_03_send.hold_reg_num & 0xFF;
                pdata->func_03_send.crc16 = modbus_master_crc16(pdata->send_buff, (p - pdata->send_buff));
                *p++ = (pdata->func_03_send.crc16 >> 8) & 0xFF;
                *p++ = pdata->func_03_send.crc16 & 0xFF;
                break;

            case 4:
                /*地址(1Byte) 功能码(1Byte)	起始地址(2Bytes) 输入寄存器数量(2Bytes) CRC(2Bytes)*/
                *p++ = pdata->func_04_send.dev_addr;
                *p++ = pdata->func_04_send.func_code;
                *p++ = (pdata->func_04_send.start_addr >> 8) & 0xFF;
                *p++ = pdata->func_04_send.start_addr & 0xFF;
                *p++ = (pdata->func_04_send.input_reg_num >> 8) & 0xFF;
                *p++ = pdata->func_04_send.input_reg_num & 0xFF;
                pdata->func_04_send.crc16 = modbus_master_crc16(pdata->send_buff, (p - pdata->send_buff));
                *p++ = (pdata->func_04_send.crc16 >> 8) & 0xFF;
                *p++ = pdata->func_04_send.crc16 & 0xFF;
                break;

            case 5:
                /*地址(1Byte) 功能码(1Byte)	起始地址(2Bytes) 线圈值(2Bytes) CRC(2Bytes)*/
                *p++ = pdata->func_05_send.dev_addr;
                *p++ = pdata->func_05_send.func_code;
                *p++ = (pdata->func_05_send.start_addr >> 8) & 0xFF;
                *p++ = pdata->func_05_send.start_addr & 0xFF;
                *p++ = (pdata->func_05_send.coil_value >> 8) & 0xFF;
                *p++ = pdata->func_05_send.coil_value & 0xFF;
                pdata->func_05_send.crc16 = modbus_master_crc16(pdata->send_buff, (p - pdata->send_buff));
                *p++ = (pdata->func_05_send.crc16 >> 8) & 0xFF;
                *p++ = pdata->func_05_send.crc16 & 0xFF;
                break;

            case 6:
                /*地址(1Byte) 功能码(1Byte)	起始地址(2Bytes) 线圈值(2Bytes) CRC(2Bytes)*/
                *p++ = pdata->func_06_send.dev_addr;
                *p++ = pdata->func_06_send.func_code;
                *p++ = (pdata->func_06_send.start_addr >> 8) & 0xFF;
                *p++ = pdata->func_06_send.start_addr & 0xFF;
                *p++ = (pdata->func_06_send.hold_reg_value >> 8) & 0xFF;
                *p++ = pdata->func_06_send.hold_reg_value & 0xFF;
                pdata->func_06_send.crc16 = modbus_master_crc16(pdata->send_buff, (p - pdata->send_buff));
                *p++ = (pdata->func_06_send.crc16 >> 8) & 0xFF;
                *p++ = pdata->func_06_send.crc16 & 0xFF;
                break;

            case 15:
                /*地址(1Byte) 功能码(1Byte)	起始地址(2Bytes) 写入线圈个数(2Bytes) 字节个数(2Bytes) 数据(N Bytes) CRC(2Bytes)*/
                *p++ = pdata->func_15_send.dev_addr;
                *p++ = pdata->func_15_send.func_code;
                *p++ = (pdata->func_15_send.start_addr >> 8) & 0xFF;
                *p++ = pdata->func_15_send.start_addr & 0xFF;
                *p++ = (pdata->func_15_send.coil_num >> 8) & 0xFF;
                *p++ = pdata->func_15_send.coil_num & 0xFF;
                pdata->func_15_send.bytes = (pdata->func_15_send.coil_num / 8) + 1;
                *p++ = pdata->func_15_send.bytes;
                if(!pdata->func_15_send.data){
                    return 0;
                }
                memcpy(p, pdata->func_15_send.data, pdata->func_15_send.bytes);
                p   += pdata->func_15_send.bytes;
                pdata->func_15_send.crc16 = modbus_master_crc16(pdata->send_buff, (p - pdata->send_buff));
                *p++ = (pdata->func_15_send.crc16 >> 8) & 0xFF;
                *p++ = pdata->func_15_send.crc16 & 0xFF;
                break;

            case 16:
                /*地址(1Byte) 功能码(1Byte)	起始地址(2Bytes) 写入保持寄存器个数(2Bytes) 字节个数(2Bytes) 数据(N Bytes) CRC(2Bytes)*/
                *p++ = pdata->func_16_send.dev_addr;
                *p++ = pdata->func_16_send.func_code;
                *p++ = (pdata->func_16_send.start_addr >> 8) & 0xFF;
                *p++ = pdata->func_16_send.start_addr & 0xFF;
                *p++ = (pdata->func_16_send.hold_reg_num >> 8) & 0xFF;
                *p++ = pdata->func_16_send.hold_reg_num & 0xFF;
                pdata->func_16_send.bytes = pdata->func_16_send.hold_reg_num * 2;
                *p++ = pdata->func_16_send.bytes;
                if(!pdata->func_16_send.data){
                    return 0;
                }
                for(i = 0; i < pdata->func_16_send.hold_reg_num; i ++){
                    *p++ = (pdata->func_16_send.data[i] >> 8) & 0xFF;
                    *p++ = pdata->func_16_send.data[i] & 0xFF;
                }
                //memcpy(p, pdata->func_16_send.data, pdata->func_16_send.bytes);
                //p   += pdata->func_16_send.bytes;
                pdata->func_16_send.crc16 = modbus_master_crc16(pdata->send_buff, (p - pdata->send_buff));
                *p++ = (pdata->func_16_send.crc16 >> 8) & 0xFF;
                *p++ = pdata->func_16_send.crc16 & 0xFF;
                break;

            default:
                return 0;
        }
        pdata->send_length = p - pdata->send_buff;
        vdata_modbus_master_data_out(pdata->send_buff , pdata->send_length);
        return pdata->send_length;
    }else {
        return 0;
    }
}

uint16_t vdata_modbus_send_fun01(vdata_modbus_master_t *pdata, uint16_t start_addr, uint16_t coil_num)
{
    pdata->func_01_send.dev_addr = modbus_master_addr;
    pdata->func_01_send.func_code = 0x01;
    pdata->func_01_send.start_addr = start_addr;
    pdata->func_01_send.coil_num = coil_num;
    vdata_modbus_master_packet(pdata);
    return coil_num;
}

uint16_t vdata_modbus_send_fun02(vdata_modbus_master_t *pdata, uint16_t start_addr, uint16_t input_status_num)
{
    pdata->func_02_send.dev_addr = modbus_master_addr;
    pdata->func_02_send.func_code = 0x02;
    pdata->func_02_send.start_addr = start_addr;
    pdata->func_02_send.input_status_num = input_status_num;
    vdata_modbus_master_packet(pdata);
    return input_status_num;
}

uint16_t vdata_modbus_send_fun03(vdata_modbus_master_t *pdata, uint16_t start_addr, uint16_t hold_reg_num)
{
    pdata->func_03_send.dev_addr = modbus_master_addr;
    pdata->func_03_send.func_code = 0x03;
    pdata->func_03_send.start_addr = start_addr;
    pdata->func_03_send.hold_reg_num = hold_reg_num;
    vdata_modbus_master_packet(pdata);
    return hold_reg_num;
}

uint16_t vdata_modbus_send_fun04(vdata_modbus_master_t *pdata, uint16_t start_addr, uint16_t input_reg_num)
{
    pdata->func_04_send.dev_addr = modbus_master_addr;
    pdata->func_04_send.func_code = 0x04;
    pdata->func_04_send.start_addr = start_addr;
    pdata->func_04_send.input_reg_num = input_reg_num;
    vdata_modbus_master_packet(pdata);
    return input_reg_num;
}

uint16_t vdata_modbus_send_fun05(vdata_modbus_master_t *pdata, uint16_t start_addr, uint16_t coil_value)
{
    pdata->func_05_send.dev_addr = modbus_master_addr;
    pdata->func_05_send.func_code = 0x05;
    pdata->func_05_send.start_addr = start_addr;
    pdata->func_05_send.coil_value = coil_value;
    vdata_modbus_master_packet(pdata);
    return coil_value;
}

uint16_t vdata_modbus_send_fun06(vdata_modbus_master_t *pdata, uint16_t start_addr, uint16_t hold_reg_value)
{
    pdata->func_06_send.dev_addr = modbus_master_addr;
    pdata->func_06_send.func_code = 0x06;
    pdata->func_06_send.start_addr = start_addr;
    pdata->func_06_send.hold_reg_value = hold_reg_value;
    vdata_modbus_master_packet(pdata);
    return hold_reg_value;
}

uint16_t vdata_modbus_send_fun15(vdata_modbus_master_t *pdata, uint16_t start_addr, uint16_t coil_num, uint8_t *data)
{
    if(!data){
        return 0;
    }
    pdata->func_15_send.dev_addr = modbus_master_addr;
    pdata->func_15_send.func_code = 0x0F;
    pdata->func_15_send.start_addr = start_addr;
    pdata->func_15_send.coil_num = coil_num;
    pdata->func_15_send.data = data;
    vdata_modbus_master_packet(pdata);
    return coil_num;
}

uint16_t vdata_modbus_send_fun16(vdata_modbus_master_t *pdata, uint16_t start_addr, uint16_t hold_reg_num, uint16_t *data)
{
    if(!data){
        return 0;
    }
    pdata->func_16_send.dev_addr = modbus_master_addr;
    pdata->func_16_send.func_code = 0x10;
    pdata->func_16_send.start_addr = start_addr;
    pdata->func_16_send.hold_reg_num = hold_reg_num;
    pdata->func_16_send.data = data;
    vdata_modbus_master_packet(pdata);
    return hold_reg_num;
}

void vdata_modbus_master_sem_post(void *sem)
{
    sem = sem;
    //OSMboxPost(vdata_modbus_sem,(void *)0x10);
}

void vdata_modbus_master_data_out(uint8_t *buff, uint16_t length)
{
    uint16_t i = 0;
    printf("Master Request:\r\n");
    for(i = 0; i < length; i++){
        printf("%02X ", buff[i]);
    }
    printf("\r\n");
}

void vdata_set_modbus_master_addr(uint8_t master_addr)
{
    modbus_master_addr = master_addr;
}

